42520154 has 4 divisors (see below), whose sum is σ = 63780234. Its totient is φ = 21260076.

The previous prime is 42520139. The next prime is 42520183. The reversal of 42520154 is 45102524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31663129 + 10857025 = 5627^2 + 3295^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630037 + ... + 10630040.

Almost surely, 2^42520154 is an apocalyptic number.

42520154 is a deficient number, since it is larger than the sum of its proper divisors (21260080).

42520154 is a wasteful number, since it uses less digits than its factorization.

42520154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21260079.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42520154 is about 6520.7479632324. The cubic root of 42520154 is about 349.0317565649.

Adding to 42520154 its reverse (45102524), we get a palindrome (87622678).

The spelling of 42520154 in words is "forty-two million, five hundred twenty thousand, one hundred fifty-four".